Survivor: Heroes vs. Villains: A Battle 10 Years in the Making - Featured

Survivor often has boiled down to power struggles between perceived good and evil. So it made sense to host/executive producer Jeff Probst to celebrate the show's 10-year anniversary and 20th season with the Heroes vs. Villains edition.

"Heroes vs. Villains was a great idea from the get-go and I think we all knew it," Probst says. "It captures what Survivor really has become about, the good versus the bad."

Signing on also proved to be a no-brainer for many former castaways, even past winners such as Tom Westman from the Cook Islands. "As a fan of the game, you want to go out and compete against these people and see if you've got what it takes."

Other contestants say they just wanted to give back to the show (premiering Thursday at 8/7c on CBS) that gave them so much.